Your BMI result
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Enter your data to calculate your BMI.
Fill in the form and click "Calculate BMI" to see your personalised result.
Underweight0.0 – 18.5
Normal18.5 – 25.0
Overweight25.0 – 30.0
Obesity30.0 – 60.0
Body Mass Index (BMI) Calculator
Enter your measurements to get your BMI in a fast and simple way.
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BMI explained: make sense of your number
Understand what the Body Mass Index really shows, what each range means and how to combine it with other metrics for better decisions.
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Quick guide to BMI
Body Mass Index (BMI) relates weight and height to estimate body composition ranges. It is a population guideline and does not replace individual clinical assessment.
How it is calculated
BMI = weight (kg) / height (m)². Imperial inputs are converted to metric before performing the calculation.
Form fields
- Weight: enter your current body weight in kilograms (or pounds when using the imperial system).
- Height: enter your height in centimetres (or inches when using the imperial system).
Interpreting results
| BMI range | Category |
|---|---|
| 0.0 – 18.5 | Underweight |
| 18.5 – 25.0 | Healthy |
| 25.0 – 30.0 | Overweight |
| 30.0 – 60.0 | Obesity |
Practical tips
- Combine BMI with waist circumference, body composition and professional review.
- Sustained habit changes (activity, nutrition, rest) deliver lasting improvements.